We will make sure there are no issues with the pool. It takes about 10 minutes to fill a 3000-gallon pool with 1 psi of water pressure. Best Intex Pool Reviews Complete Buyer S Guide Intex Pool Pool Intex If youre pumping at 30 gallonsminute or 1800 gallonshour and you have a 25000 gallon 946353 L pool it. . How long does it take to fill up a 16 ft pool. A small inground pool at 12 feet wide and 24 feet long with an average depth of 7 12 feet holds 8900 gallons. For example if you have a 20000-gallon pool it will take about 37 hours to completely fill. If your pool has a larger volume it may take longer. The general rule of. The processes is completed. Roughly it takes about two days to fill your pool completely. We will fill the pool up with water. If you had a 20000-gallon pool for example it will take roughly 37. Click to see full answer. How long does it take to fill a pool. The averag